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As above this is pretty dependant on your audience and brand but if your research indicates that colour is a large part of the purchasing decision something like this could be an effective way of putting that front and centre
http://rflx.bjornborg.com/

as far as I know trust is a multidimensional construct (covering the dimensions of competence, benevolence and integrity) and therefore quite hard to grasp. That could explain why I couldn’t find any research related your particular question.
With regarding to any UX related topic that hasn’t been empirically proven I always stick to practically proven ...

When you validate an email address, you are checking two things:
Is this a valid email?
Does this user have access to this email?
The only way to do 1. is to send an email, and check that it doesn't bounce. And the only way to do 2. is to send an email with some information and check that the user received that information. That can either be done by ...

Sitesearch is an important navigation function of an online store. So, make the search box clear and prominent on the site-wide header. If your product catalog is very large, then allow users to choose the category before they perform the search. Don’t place any other boxes in the header other than the search box as that would confuse the shoppers. Use a ...

I am also working on a similar site.
What came out from customers is that difference from initial price to the "offer" price is the most important.
Problem is that if the initial price is low eg. initial price is 3$, then the difference will be very low even when the percentage is high.
To sum up best practise is to empasize on price when the difference is ...

If people were rational, they would disregard the discount and look only at the final price. But people aren't rational. Retailers have figured out that if store A advertises a product for $20, and store B advertises the same product as "regularly $40, today only 25% off", people will buy from store B to get the big discount, even though the final price is ...

There's a whole field of academic study called "Behavioural Economics" which researches how real people actually make 'economic' decisions.
This book contains examples which relate:
Predictably Irrational: The Hidden Forces That Shape Our Decisions is a 2008 book by Dan Ariely, in which he challenges readers' assumptions about making decisions based on ...

I agree with one of the comments - if you can set your max visibility item to be the thing they sorted or searched by then you have the best of all possible worlds.
Making the things visually different is good, too - have one in bold, another in a larger font, so that they all stand out, and their eyes - or rather, their mental filter of "what I'm searching ...